Replacing worn bush on MF -135 Lift Cover.

islandtrac

New User
Need some experienced advice on how to remove/replace worn bushings on the hydraulic Lift shaft....... I thought the shaft would slide off easily after the arms were removed.....but this is not so. Seems to be bouncing against the old bushings either way. It appears the splines that engages the Lift Arm are larger than the bushing on both ends....... please advise
 
You'll have to take the top cover off to replace them. The internal lift arm will fall out and become a pita otherwise. One side will pull the bushings out with the shaft so that is pretty normal. The new bushings will also have to be sized as well. Another reason to take the cover off as the copper dust goes everywhere. Good time to clean up any excess grease that has built up in there.
Clean up the rock shaft real good and inspect it. More than likely you'll find grooves worn in it from the bushings and need replacement too.
 
(quoted from post at 06:08:19 05/29/17) You'll have to take the top cover off to replace them. The internal lift arm will fall out and become a pita otherwise. One side will pull the bushings out with the shaft so that is pretty normal. The new bushings will also have to be sized as well. Another reason to take the cover off as the copper dust goes everywhere. Good time to clean up any excess grease that has built up in there.
Clean up the rock shaft real good and inspect it. More than likely you'll find grooves worn in it from the bushings and need replacement too.

I forgot to mention that the Top Cover is already off and pretty much everything else for inspection / replacement etc. I observed the the shaft had visible lateral play (up and down) so I thought that I may as well replace the bushings and "O" rings. I did not anticipate that the shaft would be so difficult to come off. The Service manual suggested that I remove the right arm and push the shaft and left arm out through the othe side so I got the impression that was simple slide out. What you are confirming is that the the larger splines that engage the Lift Arm will drive out the bushing........... Is that correct? If so, I may have to use a press to avoid excess hammering on the shaft itself.
 
Correct. The inner splines are larger than the bushings and one side will pull out with the shaft. Shouldn't need a press to do it. Hammer and a punch should be able to push it out.
On a side note.. The original bushings were a two piece design while the replacements are a one piece.
 
(quoted from post at 05:32:07 05/30/17) Correct. The inner splines are larger than the bushings and one side will pull out with the shaft. Shouldn't need a press to do it. Hammer and a punch should be able to push it out.
On a side note.. The original bushings were a two piece design while the replacements are a one piece.


Grateful for that timely advice. I could now proceed with less apprehension. I take note of the bushing update as well..
Thanks.

I am also rebuilding the original Quadrant but is uncertain of the configuration of the rollers /Shaft. The outer shaft [controlling the Position] is no problem because there is a key in the lever which makes it a ‘one way’ installation. The inner shaft [controlling the Draft] is held by a pin that secures the lever to the shaft and it will install in two positions (180 Deg apart). See attached composite Pics and advise which is correct -left or right????
My restoration project is a 1967 MF135UK. Perkins Diesel powered with a MK-11 Hydraulic Pump with Pressure Control.
49275.jpg
 
Been a while since i looked at that but i think the left one is correct. Maybe one of the other guys can chime in and verify or correct me.
Hang onto your old bushings for now. When you go to reinstall you'll have to install one of the bushings with the shaft installed. The old bushings make the perfect size "tool" to slide over the shaft and sit on the new bushing to drive the new one in place. Don't care if you bugger up the old bushings since you will be throwing them away when done.
 
(quoted from post at 05:20:13 05/31/17) Been a while since i looked at that but i think the left one is correct. Maybe one of the other guys can chime in and verify or correct me.
Hang onto your old bushings for now. When you go to reinstall you'll have to install one of the bushings with the shaft installed. The old bushings make the perfect size "tool" to slide over the shaft and sit on the new bushing to drive the new one in place. Don't care if you bugger up the old bushings since you will be throwing them away when done.

Thanks for that heads-up. I was kinda on the same wave-length about the installation of the new bushings.
In another forum (I think) someone concurred with you about the Quadrant roller/shaft configuration. I want to be double or triple sure because I saw a tractor split through and through and it was suggested it was likely due to incorrect placing of the rollers/shaft upon re-assembly..........
 
Slide the housing back in and see if the linkage works as expected. Should be pretty obvious if it's right or not. The linkage will move or it won't kind of thing. Hopefully one of the other guys will chime in...
 

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